Amplitude
Weights & Biases
| Feature | Amplitude | Weights & Biases |
|---|---|---|
| Pricing | Free / from $49/mo | Free / from $50/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.4 / 5 | 4.7 / 5 |
| Best For | product-teams, growth-teams, data-analysts, saas-companies | ml-engineers, research-teams, ai-companies, data-scientists |
| Founded | 2012 | 2017 |
| Event Analytics | ✓ | ✗ |
| Cohort Analysis | ✓ | ✗ |
| Funnels | ✓ | ✗ |
| Retention | ✓ | ✗ |
| Experimentation | ✓ | ✗ |
| Session Replay | ✓ | ✗ |
| Cdp | ✓ | ✗ |
| Experiment Tracking | ✗ | ✓ |
| Model Registry | ✗ | ✓ |
| Sweeps | ✗ | ✓ |
| Artifacts | ✗ | ✓ |
| Reports | ✗ | ✓ |
| Launch | ✗ | ✓ |
✓ Amplitude Pros
- Powerful behavioral cohort analysis
- Free tier generous (50K monthly tracked users)
- Built-in experimentation (A/B testing)
- Excellent for product-led growth metrics
✗ Amplitude Cons
- Complex event taxonomy required upfront
- Expensive at scale beyond free tier
- Steep learning curve for non-analysts
✓ Weights & Biases Pros
- Best-in-class experiment tracking
- Beautiful visualizations
- Great collaboration features
- Generous free tier
✗ Weights & Biases Cons
- Learning curve for full platform
- Can be expensive for large teams
- Requires integration work
The Verdict
Amplitude is built for product teams and growth teams, with a focus on event-analytics and cohort-analysis. Weights & Biases targets ml engineers and research teams and leads with experiment-tracking and model-registry.
Pricing is close: Amplitude starts at $49/mo versus $50/mo for Weights & Biases — not a deciding factor on its own.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Feature-wise, Amplitude offers broader built-in capabilities (7 features vs 6), while Weights & Biases takes a more focused approach — which can mean a simpler, faster onboarding experience.
Bottom line: Weights & Biases has a slight overall edge — but if powerful behavioral cohort analysis matters most to you, Amplitude may still be the right call.